Akira Kakuto submitted an update to the
xetex-def
package.
Version number: 4.06 2015-09-11 License type: lppl
Summary description: Colour and graphics support for XeTeX
Announcement text: ---------------------------------------------------------------------- This xetex.def supports a new option [pagebox=artbox, etc.] in PDF inclusion, like that in pdflatex, in xelatex. It requires new xetex and xdvipdfmx, which will be available in TeX Live 2016. Interested users may build new xetex and xdvipdfmx by using new sources in the TeX Live repository. If the new option is not used, the xetex.def is compatible with binaries in TeX Live 2015. ----------------------------------------------------------------------
This package is located at http://mirror.ctan.org/graphics/xetex/latex
More information is at http://www.ctan.org/pkg/xetex-def
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Thanks for the upload.
For the CTAN Team Manfred Lotz